Telephone-receiver



(NModel.)

. T. F. TAYLOR.

I TELEPHONE RECEIVER. No. 314,157.` Patented Mar.' 17, 1885.

NESSES INVENTOR. Tlwdafef'qyzw; Llng his ,alfforneg/S l hhhhhhhhhhhhhhhhhhhhhhhhhhhhh u UNITED STATES PATENT OFFICE.

THEODORE F. TAYLOR, OF BROOKLYN, NEV YORK. Y

TELEPHONE-RECEIVER.

ePnoIFtcATIoN forming part of Letters Patent No. 314,157,61atea Maren 17,1885.

Application filed January 7, 1884. (No model.) Patentediu England February 5, 1.484, No. 2,703; in France February 5, 1884, No.

160,135; in Germany February 5, 1884; in Belgium February 15, 1594, No. 61,050, and iu Canada June 16, 1884, No.19,581. l`

To all whom it 77u11/ concern:

Be it known that I, THEoDoRE F. TAYLOR, a citizen of the United States, residing in Brooklyn, in the county of Kings and State of New York, have invented certain new and' useful Improvements in Telephone-Receivers, of which the following is a specification.

The invention relates to the class of instruments employed for translating into corresponding air-vibrations or sound-waves the variations in the strength of an electric current which have been established through the agency of vocal or other sounds.

The object of the invention is to provide means for producing from the variations of the character mentioned better or more effective results than it has heretofore been possible to obtain from the telephones now in common use.

Thev invention consists, generally, in so disposing an electric conductor that different portions of its length are brought into proximity to each other, and a current of electricity caused to traverse the same Will pass and repass in approximately parallel directions or in opposite directions through such different portions, and in supporting such av conductor upon the surface of a soft-iron plate. To this end the conductor may be arranged in the form of a fiat spiral coil, and secured to the inner surface of one side of a fiat ora concave iron box. The conductor itself', when currents of considerable electro-motive force are employed, preferably consists of an insulated soft-iron wire or narrow strip of soft iron. Such an instrument will be found to respond readily and very effectively to the variations in an electric current which are produced by means of any convenient form of telephonie transmitter, and acoustic vibrations will be established by the receiver, which correspond to the vibrations whereby the variations in the current were primarily occasioned. The invention is not, however, ccnfined to the organization of an electric conductor in the precise manner described, for it is evident that there are numerous other ways in which the conductor may be disposed for securing the same or similar results upon the same principle.

In the accompanying drawings, Figure l is a plan view, partly in section, of au instrument based upon the principle of this invention; and Fig. 2 is a vertical transverse section of the saine. Fig. 8 illustrates a modification in the construction of the instrument.

Referring to Figs. l and 2, A represents a suitable case of soft iron, constituting at the same time a support for the several parts of the instrument and a resonant body for intensifying the sound-vibrations produced thereby. This case may be constructed in the form of a flat circular box consisting of a cover, a,'and a main portion, c2, adapted to be fitted together as shown, or they may be constructed in any other convenient form. The flat portion C of the top a of the box or case is preferably perforated at its center, as shown at f', for the purpose of more readily permitting the sound-Waves to escape from the interior of the instrument. ner surface of the flat portion C2 of the bottom a2 of the boX is placed a flat spiral coil of wire, as shown at c2. This coil is preferably secured to the surface of the iron plate G2 by means of a thick varnish or other similar material. The conductor c2 is preferably for use under certain conditions, itself of softiron, for the purpose of rendering the operation of the instrument still more effective. Conductors formed from other metals nay, however, be employed in this form of instrument. The two terminals d and Pare secured to suitable binding-posts, c and c?, by means of which electrical connections may be conveniently established with' the same when the instrument is put in use.

The current employed for operating the instrument may be obtained in any of the usual manners. In practice it will be found convenient to employ some suitable form of transmitting instrument adapted to vary the strength of an electric current correlatively with the sound-Waves embodying the words which it is desired to transmit.

In Fig. 3 a modification in the construction of the instrument is illustrated. This modification consists, merely, in extending the convolutions of the conductor upon the inner surface of the top or cover a of the box, as shown Upon the in- `of the case, as shown at c3.

Having,` on the 8d, 7th, and the 29th days of January, 1884, filed certain other applications (serial Nos. 116,361, 116,624, and 119,089, re-

spectively) for Letters Patent for certain improvements in telephone-receivers, and having in those applications described certain features involved in this application, I do not herein claim any improvements shown, described, and claimed in either of those applications and not specifically claimed herein.

' I'claim as my inventionl. A telephonie receiving-instrument consisting` of an electrical conductor formed into two iiat confronting,` spirals situated in parallel planes, in combination with means, substantially such as described, for placing the same in circuitvwith a main line, and an iron case upon or Within which said conductor is supported.

2. A telephonie receiving-instrument consisting,` of an electric conductor formed into tWo flat confronting spirals situated in parallel planes and connected in series, in combination with means, substantially such as described, for placing` the same in circuit with a main line, and an iron case in which said oonductor is supported.

3. A telephonie receiving-instrument consisting in the combination, substantially as hereinbefore set forth, of an electrical conductor formed into two confron-tin'g flat spirals situated in parallel planes, andsoft-iron plates for supporting the same.

In testimony whereof I have hereunto subscribed my nalne this 5th day of January, A. D. 1884. l

THEODORE F. TAYLOR.

'Vitnesses:

CARRIE E. DAvInsoN, CHARLES A. TERRY. 

